Operating System Lab Manual CS 2254

vi EDITOR COMMANDS
EX.NO :1.b
DATE :

AIM: UNIX.
To study the various commands operated in vi editor in

DESCRIPTION :
The Vi editor is a visual editor used to create and edit text, files, documents and
to add, delete or
programs. It displays the content of files on the screen and allows auser
change part of text. There are three modes available in the Vi editor, they are
1.Command mode
2.Input (or) insert mode.

Starting Vi:
The Vi editor is invoked by giving the following commands in UNIX prompt.
Svntax: $vi<filename> (or)
$vi
This command would opena display screen with 25 lines and with tilt (~) symbol at the
start of each line. The first syntax would save the file in the filename mentioned and for the
next the filename must be mentioned at the end.

Options:
l.vi+n<filename>- thiswould point at the nth line (cursor pos).
2.vi -n <filename>- This command is tomake the file to read only to change
from one mode to another press escape key.

INSERTING AND REPLACING COMMANDS:

To move editor from command node to edit mode, you have to press the <ESC> key.
For inserting and replacing the following commands are used.
1.ESC a Command:
This command is used to move the edit mode and start to append after the current
character.
Syntax : <BSC>a

2.ESC A COMMAND :
This command is also used to append the file , but this command append at the end of
current line.
Syntax : <ESC> A

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 Manual CS 2254
OperatingSystem Lab
3.ESC i Command:
insert the text before the current cursor position.
This command is used to
Syntax : <ESC>i

4.ESC ICommand : of the current line.

Thiscommand is used to insert at the beginning
Syntax : <ESC> I

5.ESC o Command:
allow insertion of
This command is insert a blank line below the current line &
contents.
Syntax : <ESC>0

6.ESC O Command:
This command is used to insert a blank line above &allow insertion of contents.
Svntax : <ESC> O

7.ESC r Command:
This command is to replace the particular character with the given characters.
Svntax : <ESC> rx Where x isthe new character.
8.ESC R Command :
This command is used to replace the particular text witha given text.
Syntax : <ESC> R text

9.<ESC>s Command :
This command replaces a single character with a group of character
Syntax : <ESC> s
10.<ESC>SCommand:
This command is used to replace a current line with group of characters.
Syntax : <ESC> S

CURSOR MOVEMENT IN vi:

1<ESC>h:
This command is used to move to the previous character typed. It is used
left of the text. It can also used to move character by character to moye to
(or) a number of characters.
Syntax : <ESC>h- to move one character to left.
<ESC> nh - tomove 'n' character to left.

2.<ESC>l:
This command is used to move to the right of the cursor (ie) to the next character It can
also be used to move the cursor for a number of character.
Syntax : <ESC>1-single character to right.
<ESC> nl -n' characters to right.

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 Operating System Lab Manual CS 2254
3.<ESC> i:
This command is used to move down a single line or a number of lines.
Syntax :
<ESC>j-singledown movement.
<ESC> nj n times down movement.

4.<ESC> k: number of lines.

This command is used to move up a single line or a
Syntax :
<ESC> k- single line above.
<ESC> nk n' lines above.

5.ENTER (OR) NENTER: of next lines or a group of lines

This command will move the cursor to the starting
mentioned.
Syntax: <ESC>n enter.
<ESC> enter

6.<ESC>+ Command :
beginning of the next line.
This command is used to move to the
Svntax : <ESC> n+
<ESC>t

7<ESC>-Command :
beginning of the previous line.
This conmmand is used to move to the
Svntax :
<ESC> <ESC> n
8.<ESC> 0: of the same current line.
This command willbring the cursor to the beginning
Syntax :
<ESC> 0

9.<ESC> S:
This command will bring the cursor to the end of the current line.
Syntax :
<ESC> $

10,<ESC>^;
This command is used to move to first character of first lines,
Syntax :
<ESC> A

11.<ESC> b Command :
This command is used to move back to the previous word (or) a mumber of words.
Syntax :
<ESC> b <ESC>nb

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12,<ESC>e Command:dalenthanobstot obsn

This command is used to move towards and replace the cursor at last character of the
word (or) no of words.
Syntax :
<ESC> e <ESC>ne

13.<ESC>w Command:sl sloaiz ogu svoro bozuibusnreos

This command is used to move forward by a single word or a group of words.
ovodr onil olutz
Syntax: <ESC> nwodh ol
<ESC> W
DELETING THE TEXT FROM Vi:
1.<ESC>r Command :
this command is used.
ou To delete a character to right of current cursor positions ,
Syntax :
<ESC> x <ESC> nx

2.<ESC>X Command :
command is used.
To delete a character to left of current cursor positions , this
Syntax
<ESC> X <ESC> nX
3.<ESC> dw Command :
right of current cursor
This command is to delete a single word or number of words to
position.
<ESC> dw <ESC> ndw
4.db Command : is to delete a single word to the left of the current cursor position.
This command

<ESC> db <ESC> ndb

5.<ESC> dd Command :
This command is used to delete the current line (or) a number of line below the current
line.
Syntax :
S. <EScy
<ESC> dd <ESC> ndd
Sk agein to save
6.<ESC> dS Command : Sytax! <Esc:q
This command is used to delete the text from current cursor position tolast character of
current line.
Syntax : <ESC> d$

SAVING AND QUITING FROM vi:

1<ESC> wCommand
:ovonpiot do b,t
Tosave the given text present in the file.
Syntax : <ESC>:w d023
geven text
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3. <EscywY
4sc
Conmand same as waone qut
Synta: <Esc